This is the 782nd most frequent Italian word.
familiari
"Familiari" means "family members" or "relatives" in English.
Here, 'familiari' is used as a noun referring to family members or relatives.
I familiari della sposa erano molto emozionati.
The relatives of the bride were very emotional.
In this example, 'familiari' again serves as a noun referring to close relatives or family members.
Abbiamo passato delle belle serate con i nostri familiari.
We spent wonderful evenings with our family members.
In this sentence, 'familiari' is used as an adjective meaning 'familiar' with something.